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Index › Programming Questions & Help › Other Libraries › Traer Spring.class syntax
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Traer Spring.class syntax ? (Read 992 times)
garble
Traer Spring.class syntax ?
Sep 7th, 2007, 11:52pm  
Hello, I'm fairly new to processing, been playing with it off/ on for about a year but just started some serious stuff in the last month or so.

I've been wondering about some of these methods in the Traer.physics library (which is super sweet, I must say) that have to do with turning on and off Springs and Attractions.

Basically I can't figure out the syntax-- how do you reference the particular spring you want to turn off, call it by particle name? That hasn't worked for me yet... As far as I could see there was only one very simple instance of any of these in the examples, and it was the particle.kill() method which kills a particle 'forever.'

I unpacked the jar and looked at the the Spring.class code but that didn't help me much either:


Code:


 /* Constructors */
    public Spring(traer/physics/Particle, traer/physics/Particle, float, float, float) {
    }


    /* Methods */
    public final void turnOff() {
    }

    public final void turnOn() {
    }

    public final boolean isOn() {
    }

    public final boolean isOff() {
    }


Any Idears?
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JohnG
Re: Traer Spring.class syntax ?
Reply #1 - Sep 8th, 2007, 12:16am  
Well, you can either keep a reference ot the spring:

Code:
Spring s=pm.makeSpring(part1,part2,0.1,.5,20);
//...
s.turnOff();


Or if you've only got the particles that make up the ends stored...

Code:
for(int i=0;i<pm.numberOfSprings();i++)
{
  Spring s=pm.getSpring(i);
  if((s.getOneEnd()==part1 || s.getOneEnd()==part2) && (s.getTheOtherEnd()==part1 || s.getTheOtherEnd()==part2))
  {
    s.turnOff();
  }
}
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garble
Re: Traer Spring.class syntax ?
Reply #2 - Sep 8th, 2007, 1:00am  
Aahh, I'll give that a go. One of my problems is that I'm using arrayList's so referencing specific springs is a pain.
But I'll report back.

Thanks!
Tim
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garble
Re: Traer Spring.class syntax ?
Reply #3 - Sep 19th, 2007, 6:57pm  
thanks again John, this worked great!
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